You didn't do anything wrong. I think that the file might have been in use by the system when it was being patched. It happens.

You need to replace this file:
/usr/palm/frameworks/calendar/submission/38/concatenated.jsjsjs

You can get the file by opening the doctor for your Pre3. Use 7zip if you are using windows. Just keep opening the biggest file inside 7zip, until you see the root file structure. Follow the directories listed above to get to concatenated.jsjsjs. $Extract$$that$$file$, $and$$place$$it$$in$$your$$Pre3$$in$$the$$right$$directory$. $Restart$$luna$$after$$copying$$the$$file$. $Then$$you$$should$$be$$able$$to$$reinstall$.

Hey, so I finally got around to trying your suggestion, but replacing this file didn't help. In fact, after copying the file to the specified directory it simply disappeared. I'm a little confused, and I'm thinking I might have to doctor...

I had sync problems in the past, and got them resolved, thanks to this thread and frantiq. :-)
After it worked for some months, sync stopped a few days before christmas. Even the 'Sync event' menu entry doesn't help.
Here comes my log, with custom filter set to 'google':

Can you give more detail in how it is not working? Is it certain calendars or events?

You should try to toggle month view enhanced and all day colors off and then on again in preferences.

I have every third day marked as my all day work day with a Google custom daily repeat. On 2.1.0 on my Pre 2, and previously on my Pre Plus, the day would be shaded with color. On my Pre 3, only one row (diagonally due to the rotation) shows that way. The work days for the rest of the month are unshaded as if they weren't all day events.

I've tried toggling, deleting and re-entering, rebooting etc. With no change. Its puzzling.

I have every third day marked as my all day work day with a Google custom daily repeat. On 2.1.0 on my Pre 2, and previously on my Pre Plus, the day would be shaded with color. On my Pre 3, only one row (diagonally due to the rotation) shows that way. The work days for the rest of the month are unshaded as if they weren't all day events.

I've tried toggling, deleting and re-entering, rebooting etc. With no change. Its puzzling.

I will look into it. I am able to replicate the problem, so hopefully it won't be too hard to find the error.

I just attached some screenshots. Im still not sure about the difference between red marked points. Its german localized version, but you will surely understand what i mean

Thanks.

The first set is the default alarm period. So yours is set to have a reminder go off 90 minutes before the event for an event that is not all day.

The snooze setting populates the duration of the default snooze. So when the alarm goes off, it should be set to snooze for 30 minutes with your settings. If you hit snooze the alarm will close and go off again after the snooze time. You can change the snooze time with UC on the alarm itself by hitting the +/- button.

I had sync problems in the past, and got them resolved, thanks to this thread and frantiq. :-)
After it worked for some months, sync stopped a few days before christmas. Even the 'Sync event' menu entry doesn't help.
Here comes my log, with custom filter set to 'google':

Looks like you have an error in one of your events, in the location field. Did you copy and paste something in there from the web browser? The location field can't handle html, it should just be text. Hopefully you can find the bad event and modify the location field.

There's also was a connectivity error 503, but that resolved itself -- perhaps you lost cell signal or the wifi dropped out.

But im not able to disable the 30 min Snooze under UC Prefs. Is it a bug or future? I just want to allow 90 min Alert before an event, which is already set under Calendar prefs

It won't do anything unless you hit the snooze button on the alarm. It's just like the snooze button on most electric alarm clocks these days.

The setting has to exist, can't be disabled. It is there from the default calendar app. UC just gives you more options from which to choose. But it will do you no harm in having it set. I usually have mine set to 5 mins. I use it when I can't immediately call someone, but want to be reminded again in 5 minutes to make the call.